Description Washington Park is behind Charleston City Hall at the Four Corners of Law. The Basket ladies actually set up diagonally across behind the Post Office, but I think in the interest of aesthetics, this is where they should be. Especially in the spring when the peppermint peach trees are in bloom, and you see all shades of pink in a single tree. Sweetgrass basket sewing is found all over Charleston, but not here except in my imaginary image. The Fireproof Building is in the background, headquarters of the South Carolina Historical Society. It was built in 1822 as a state office building with fireproof storage for records of the Charleston District.